DriverHeaven's 11W ITX build
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DriverHeaven's 11W ITX build
See it here. No moving parts and only 11W under load!
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While 11W for an entire PC is impressive, I can't help but think that Via's processors aren't getting very good performance per watt: A 65nm Athlon64 x2 5000+ has a TDP of 65W and runs at 2.6GHz, 1.35V. Let's imagine that when underclocked to 1GHz it could run at 0.8V (my 4000+ can, so this seems likely). The new TDP will be approximately reduced to 65*(0.8^2)/(1.35^2) = 23W from the voltage reduction, and further down to 23*1/2.6 = 9W from the clock speed reduction. Somewhat more than the C7, but the performance will be about 3 times greater. I think Intel's current CPUs might be even better than that, but I can't be arsed to dig up more numbers.
I suppose the obstacle to achieving low system power consumption like that would be finding a low-power motherboard.
I suppose the obstacle to achieving low system power consumption like that would be finding a low-power motherboard.
I doubt it; I've yet to hear of a C2D that can tolerate sub-0.95V, and the large cache and high idle consumption suggest sub-10W might be hard to achieve. However, Desktop CPU Power Survey showed Core Duo are excellent in this respect (1.5W consumption at idle).I think Intel's current CPUs might be even better than that